Ventilating device.



PATENTED DEC. 20, 1904.

C. H. PORTER. VENTILATING DEVICE.

APPLIGATION FILED JUNE 18. 1904:.

N0 MODEL.

hm rinnrnnmm UNITED STATES Patented December 20, 1904.

PATENT O FICE.

oHARLEs H. PORTER, E PHILADELPHIA, PENNSYLVANIA.

VENTILATING DEVICE.

SPECIFICATION forming part of Letters Patent No. 778,204, dated December 20, 1904.

' Application filed June 18, 1904:. Serial No. 213,153.

To all whom it may concern;

Beit known that I, (JI-IARLEs H. PORTE a citizen of the United States, residing inPhiladelphia,in the county of Philadelphia and State of Pennsylvania, have invented new and useful Improvements in Ventilating Devices, of which the following is a specification.

My invention relates to improvements in ventilating devices, and the object is to simplify and improve the existing devices used 7 for the purpose of taking foul air from cars improvements in ventilating means or devices.

or other apartments.

In the ordinary means of ventilating by adjustable vanes or swinging members the pivoted vanes located in the lantern of a-car are attended with more or less inconvenience in attaining perfect ventilation, because the -air' hugs the exposed walls of the lantern and is confined between the ceiling and the roof of the lantern, so as to have but little or no vertical escape. I propose to take the foul air which rises into the lantern from below directly from the car instead of forcing pure air into the lantern, as generally takes place under this mode of-ventilation in common use.

As stated, my present invention relates to vention in the accompanying drawings" to be taken as a part of this specification.

Reference being had to the drawings, Figure 1 is a vertical transverse section taken centrally through the device, the complete assemblage of the parts positioned as being open to permit free ventilation, the lantern and a portion of the car-roof being shown in section. Fig. 2 is a similar view showing the slots 13, placed in vertical direction.

parts as closed to prevent the advent of the air through the device.

,In the drawings the same parts appearing in both figures are designated by similar reference notations.

Referring to the drawings, 1 designates a pipe or cylinder, of metal or any proper material and made of such size as may be required to effect the object. At a proper point diametrically across the interior of the cylinder is fixed a cross-bar 2, made with a central aperture through which the actuating-screw passes.

3 designates the actuating-screw, which is and pushing them out into ventilating position at the same time. On the upper portion of the screw is arranged a cross-bar 5, having a central threaded aperture through which the screw engages and carrying a ring 6, to the upper end or edgeofwhich is secured a wirenetting cylinder 8, having a bottom of the samematerial, as shown, and on the top of this is fixed a stiffening-ring 9. It will be readily perceived that by turning the actuat ing-screw in a certain direction the foraminated cylinder will be projected out of the cylinder 1 and on reversal of the screw the cylinder 8 will be drawn within the cylinder, as shown in Fig. 2 of the drawings. On the ring 9' overthe cylinder is secured a hood 1(), which extends beyond the edge of the ventilating-cylinder 8 and shuts out all material which might otherwise enter the device from the open top.

On the screw 3 below the cross-bar 2 is a cross-bar 11, having a central threaded aperture engaged by the screw. The end-s of the cross-bar 11 are fixed to the upper edge of a ventilating-ring 12, slidably arranged within the cylinder 1 and formed with ventilating- The ventilating-ring 12- is made with a bottom, through which the actuating-screw 3 extends, substantially as seen in the, drawings, and to the lower end of the screw is fixed a suitable handpiece 14, which in the upper movement The operation of the device is readily dis-' cerned from the foregoing description, taken in connection with the illustrations. The screw may be turned to project the ventilating parts in opposite directions from the cylinder 1 to their limit or to such intermediate position as may be desired, and then by reversing the screw the parts may be drawn within the cylinder and draft through the device entirely shut ofl'.

The upper reticulated cylinder is made somewhat longer than the lower ventilatingring, so as to provide ample discharge of air therethrough rising from the freer influent slots in the ventilating-ring in the base of the cylinder, and this differential movement is accomplished by making the screw-threads of the lower stem of the actuating-screw of less pitch than the threads of the upper stem, but both ventilating members move in unison and reach their closed and opened positions synehronously.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. A ventilator for cars and similar construetions, comprising a cylinder open at each end, upper and lower closures for the ends of the cylinder slidably positioned in the cylinder, and means for moving the closures in opposite directions.

2. A ventilator for cars and similar constructions, comprising acylinder,a reticulated cylinder slidably positioned in the upper end of the first-mentioned cylinder, ahead on the reticulated cylinder, a ring provided with airpassages slidably arranged in the lower end of the cylinder, and a right and left hand screw held against endwise movement within the cylinder to move the ventilating members in opposite directions.

3. A ventilatingdevice for cars and similar constructions, comprising acylinder, a support within the cylinder provided with a central aperture, a rightand left hand screw held against endwise movement in the support, a reticulated cylinder slidably positioned in the upper end of the first-mentioned cylinder and provided with a reticulated bottom and actuated by the screw, a head on the reticulated cylinder, a ring provided with airpassages a nd a closed lower end, slidably disposed in the lower end of the inclosing cylinder, and actuated by the screw, and a handpiece on the lower end of the screw adapted to lodge against the bottom of the ring, substantially as described.

4:. A ventilator comprising a cylinder open at each end, upper and lower closures within the cylinder, and a screw connected with the cylinder and with said closures and threaded for operation to move the closures in opposite directions.

5. A ventilator comprising a cylinder open at each end, upper and lower closures within the cylinder, a cross-bar arranged transversely of the cylinder, and a screw mounted for revolution in said bar, said screw having threaded connection with the closures to move them in opposite directions.

6. A ventilator comprising a cylinder open at each end, a bar fixed transversely of the cylinder, a closure positioned in the cylinder above the bar, a closure positioned in the cylinder below the bar, and a screw-rod revolubly mounted in the bar and reversely-threaded above and below the bar, said threaded portions of the rod respectively engaging the closures.

In testimony whereof I aiiix my signature in presence of two witnesses.

CHARLES H. POh lER.

Vitnesses:

JOHN L. FLu'ronnu, KATHARINE ALLEN. 

